जसजसा रंग बदलतो, फॉरवर्ड व्होल्टेज बदलतो, त्यात:

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RRB ALP Electronics Mechanic 23 Jan 2019 Official Paper (Shift 2)
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  1. LED
  2. LCD टीव्ही
  3. रंगीत टीव्ही
  4. LED टीव्ही

Answer (Detailed Solution Below)

Option 1 : LED
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  • प्रकाश-उत्सर्जक डायोड (LED) हे एक अर्धसंवाहक उपकरण आहे जे जेव्हा विद्युत प्रवाह वाहते तेव्हा प्रकाश उत्सर्जित करते.
  • जसजसा रंग बदलतो तसतसे LED मध्ये फॉरवर्ड विद्युतदाब  बदलते.
  • सामान्यतः, LED चे फॉरवर्ड विद्युतदाब 1.8 आणि 3.3 व्होल्ट्स दरम्यान असते.
  • "पांढर्या" LED मध्ये उच्च विद्युतदाब असते, विशेषत: 3.2 - 3.6V.

त्यांचे रंग आणि विद्युतदाब ड्रॉप असलेले विविध LED खालीलप्रमाणे आहेत:

 

अर्धवाहक साहित्य तरंगलांबी रंग विद्युतदाब ड्रॉप (फॉरवर्ड)
GaAs 850 - 940 nm इन्फ्रा - लाल > 1.9 V
GaAsP 630 - 660 nm लाल 1.8 V
GaAsP 605 - 620 nm अंबर 2.05 V
GaAsP:N 585 - 595 nm पिवळा 2.15 V
AlGaP 550 - 570 nm हिरवा 2.2 V
SiC 430 - 505 nm निळा 2.6 V
GaInN 450 nm पांढरा 3.5 V
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